Pontoon Beach's Seismic Design Category, explained

Under the seismic model IBC and ASCE 7 use for new construction, Pontoon Beach is Category D. High seismic hazard - this is the category most of coastal California, the Pacific Northwest, and other active fault regions fall into. Code mandates significant seismic detailing and restricts irregular structural configurations. This is the category the Brace + Bolt scope (cripple-wall bracing, foundation bolting) is built for. Nationally, Pontoon Beach ranks above 84% of the 4,875 cities in this dataset for seismic hazard - the 84th percentile.

Where Pontoon Beach sits in Illinois

USGS's underlying values for Pontoon Beach: 0.253g peak ground acceleration, 0.441g at short period, 0.157g at 1 second. Within Illinois alone, Pontoon Beach ranks 32 of 330 cities by seismic hazard - the 91th percentile in-state. Pontoon Beach has a population of about 5,845.

What a retrofit costs in Pontoon Beach

A full earthquake retrofit typically runs $5,000-$10,000 nationally (around $7,000 typical), driven mainly by house size and foundation type, not by Illinois specifically. California's Earthquake Brace + Bolt grant, which covers a large share of this cost, is a California-only program and does not apply in Illinois.

Earthquake insurance for a Pontoon Beach home

A Pontoon Beach homeowner cannot buy a standalone earthquake policy in most cases - it is added to an existing homeowners policy as an endorsement, so the place to start is a regular home-insurance quote.

Where Pontoon Beach's figures come from

Pontoon Beach's Category D and every number above trace to USGS's own ASCE 7-16 Design Maps service - see the methodology guide. See the category explainer for what Category D does and doesn't tell you about Pontoon Beach.